Year	Number
1996	61.5
1998	59.2039794921875
2000	60.1990051269531
2002	58.2089538574219
2003	58.2089538574219
2004	66.8269195556641
2005	64.9038467407227
2006	67.788459777832
2007	64.4230804443359
2008	64.4230804443359
2009	66.8246459960938
2010	62.0853080749512
2011	62.9107971191406
2012	67.1361465454102
2013	66.6666641235352
2014	66.9950714111328
2015	68.4729080200195
2016	67.9802932739258
2017	68.4729080200195
2018	67.9611663818359
2019	70.5314025878906
2020	71.0144958496094
2021	69.5652160644531
2022	70.0483093261719